Ok, anyone who visits the Tir arena knows that a recently undercovered agent called Biohover is there most often. Some examples of the things he does.
1) Steps in, gets aggro, steps out. While you have him aggroed he can un-aggro you. When he does this, if you still have him under aggro, you cannot use specials or nanos on him. He will be able to use them on you, and choose whenever to "initiate the fight". By then you will be double drained (as I said he can drain as much as you want if you are still aggroing him).
2) Steps in, attempts to drain, if he gets hit -- BAM -- off to the nearest zone. He will continue to try that same target until the drain lands and he gets a good AS or makes sure there is no threat. None. Now I can even understand people ganking, but running when they are hurt. But he doesn't even wait and try to fight.
3) Some other things like grabbing a guard while mimic crat, coming back, stepping in and using the pet exploit so that the pet will attack and you can do nothing to him.
Simple solution to this.
Put the old rules back. If you are in a team, attack a teamed person, the teammates can kill you. Put the old rules back where if someone Q'd you, and stopped, if you had them under aggro you can continue to do everything as you were before.
Got about 15 screens of him running at almost full health, and some of him using the un-aggro exploit (though its hard to tell while looking at the screenshot).